package day29;

/**
 * 有假币
 */

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNext()){
            int n = sc.nextInt();
            if(n == 0) break;
            int count = 0;
            while (n >= 2){
                //Math.ceil向上取整,但是是double类型
                n = (int)Math.ceil((double)n/3);
                count++;
            }
            System.out.println(count);
        }
    }
}